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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: [email protected]
//
package extensions
import (
"bytes"
"github.com/pkg/errors"
"github.com/weaviate/weaviate/entities/moduletools"
)
// UseCase handles all business logic regarding extensions
type UseCase struct {
storage moduletools.Storage
}
func NewUseCase(storage moduletools.Storage) *UseCase {
return &UseCase{
storage: storage,
}
}
func (uc *UseCase) Store(concept string, value []byte) error {
err := uc.storage.Put([]byte(concept), value)
if err != nil {
return errors.Wrapf(err, "store concept %q", concept)
}
return nil
}
func (uc *UseCase) Load(concept string) ([]byte, error) {
val, err := uc.storage.Get([]byte(concept))
if err != nil {
return nil, errors.Wrapf(err, "load concept %q", concept)
}
return val, nil
}
func (uc *UseCase) LoadAll() ([]byte, error) {
buf := bytes.NewBuffer(nil)
err := uc.storage.Scan(func(k, v []byte) (bool, error) {
_, err := buf.Write(v)
if err != nil {
return false, errors.Wrapf(err, "write concept %q", string(k))
}
_, err = buf.Write([]byte("\n"))
if err != nil {
return false, errors.Wrap(err, "write newline separator")
}
return true, nil
})
if err != nil {
return nil, errors.Wrap(err, "load all concepts")
}
return buf.Bytes(), nil
}
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